import java.util.Scanner;
public class Demo04 {
  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    System.out.println("请输入考试成绩:");
    int score = scan.nextInt();
    if (score > 100) {
      System.out.println("请输入正确的成绩:");
      score = scan.nextInt();
    } else if (score > 90) {
      System.out.println("优秀");
    } else if (score > 80) {
      System.out.println("良好");
    } else if (score > 60) {
      System.out.println("及格");
    } else {
      System.out.println("请继续努力！！");
    }
    // System.out.println(num<<1);
  }
}